MAltf MODULE

MALTF is a versatile transfer function measurement program, which has been tested for National Instruments DAQ Card AI-16E-4 (a PCMCIA card used in notebook computers) and PCI MIO 16E 4 (a PCI card used in desktop computers).

The transfer function measurement is performed with impact hammer tests. The results from these tests can be displayed in different formats, and saved to disk to be imported into modal analysis software. After performing a series of impact hammer tests, the resulting transfer function will be displayed on screen. Various display options can be changed during and after the impact hammer tests to alter the way in which the information is displayed on the screen. The transfer function itself can be viewed in magnitude-phase mode, or alternately in its real and imaginary components.

The linear part(s) of the transfer function can be viewed as linear or logarithmic values. To check the validity of the results, the input signals can be viewed in time domain, or as a frequency spectrum. In addition, the transfer function can be saved in binary format and opened with the all measurement settings at a later time.

MALTF is extremely fast, very easy to use, and has the following features:

• Allows measurement in multiple directions
• Allows to use different output sources (i.e. acceloremeter, displacement sensor, shaker and force sensor) and displaying the results in any format of a/F, X/F or F/F
• Has expert system that automatically investigates the quality of the measurement and leads the user what to do in the next step until all measurements meet certain quality requirements. This reduces the inexperienced-user's faults in the measurements and provides consistency in the measurement quality
• Displays input and output signals in time domain, Magnitude & Phase, Real & Imaginary part, Power spectrum and Coherence
• Displays input and output signals in time domain, Magnitude & Phase, Real & Imaginary parts, Power spectrum and Coherence of the measurement
• Saves the measurement data in a standard format (frf) that can be directly used in the process simulation modules in CutPro or other software packages